Level



Feb. 14, 1928, 1,659,446

H. w. sHw

LEVEL Filed NOV. 29. 1926 MII @Riom/lugo.

Patented Feb. A14, V19248.

UNlTE-DSTATES PATENT OFFICE. fN

HENRY W. SHAW. or cHA'rTANooGA.,TnNNEssEE." a

LVEL. i

i ApplicationV tiled November `29, 1926. Serial No. "151,471.

This invention yailnsto provide a novel pendulum level, so constructed that it will withstand severe use and be adaptable to various kinds of work.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains. v

With the above and other objects in view l0 which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and inthe details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of whatis claimed, without departing from the spirit of the invention.

In the drawings f i Figurel shows in front elevation, a device constructed in accordance with the invention, parts being broken away;

Figure 2 is a transverse section;

Figure 3 is an elevation wherein portions of the dial and the pendulum plate have been removed.

The device forming the subject matter of' this application includes a stock 1 provided with a recess 2 which may be of circular form, the recess 2 extending into the stock from one side thereof. The numeral 3 marks a graduated ring-dial which is secured tothe stock f1 about the recess 2, the dial 3 overhanging the recess 2, as clearly shown inFigure 2 of the drawings.

A ball bearing A4 is secured at 5 to the stock 1 atrthe Vbase of the recess 2. A shaft 6 is mountedv to rotate in the ball bearing 4, and is held therein, the sha-ft 6 having a reduced end 7 forming a shoulder' 8.

An approximately semi-circular.pendulum plate 9 is mounted on the reduced end 7 of the shaft 6 and abuts against the shoulder 8. A curved weight 10 is secured to the penhas a pointed index 11 located in the same plane with the ring-dial 3 and adapted to cooperate with the graduations of the ringdial.

A washer 12 is mounted `on the end 7 of the shaft 6 and abuts against the pendulum plate 9. A circular cover 14, preferably made of metal, is mounted on the end 7 of the shaft 6 and is held against the washer 12 by means of a nut 15 threaded on the end 7 of the shaft 6. The cover plate 14 `cover 14 alined withthe pointed index 11 duluni plate 9. The pendulum plate 9` is of sulicientsiie sothat it overlapsfi-tlie ring-dial 3, as .shownwin Figure 2. Thecover 14 is provided on its outer surface with an index mark 16 which coincides` with the 60 pointed index 11 on the pendulum plate 9V In order to hold the index mark 16 of the of the pendulum plate 9, interengaginge1ements are provided on` the cover` `plate 14 and on the pendulum plate 9. These inten.` engaging elements may be in the form of a pin 17 on the cover plate 14, the pin being `received removably in an opening 18 which is formed in the pendulum plate 9.

When the parts are assembled as shown in Figure 1 of the drawings, the weight 10 causes the pendulum plate 9 to swing, the plate 9 rotating the shaft 6 in the ball bearing 4, and the index niark 16 on the cover late 14 cooperating with the graduations o the ring-dial 3, the cover plate 14 and the pendulum plate 9 being held together, not only by the clamping action of the wing -nut 15, but, as well. by reason of the fact that the pin 17 on the plate 14 is received in the opening 18 of the plate 9.

The cover plate 14 is used where there is plenty of light, and when conditions are such that it is desired to prevent sediment, dust, dirt and the like from entering the recess 2. If, however, the device is usedin a dark place, `where it will be somewhat `difficult to t 'see the index mark 16, then, by loosening the i wing nut 15, the cover plate 14 maybe removed, and the pointed part 11 of the pendulum plate 9 may be relied upon, in connection with the graduated ring-dial 3, to give the desired information.

The general construction of the device is such that if ease of reading is a prime requisite, the plate 14 may be removed, and the part 11 relied upon to give the angle; whereas, if it is desired to protect the mechanism from dirt, or against rough usage. then the plate 14 may be mounted in place and its index mark 16 be used, in conjunction with the ring-dial 3.

What is claimed is In adevice of the class described, a stock 105 provided with a recess, a graduated ringdial secured to the stock about the recess, the dial overhanging the recess, a bearing secured to the stock at the base of the recess, a shaft mounted to rotate in the bearing, the shaft having a reduced end forming a shoulder, an approximately semi-circular d pendulum plate mounted on theV reduced end cover plate being of sufcient size so that it overlaps the ring-dial, the cover plateloeing provlded on its outer' surface with an index mark Wlnch eomeldes Wlth the pomted index on the pendulum plate, and nterengagng' elements on the cover plate and on the pendulum plate.

In testimony that I elamthe foregoing as my own, I have hereto afxed my Signature.

HENRY W. SHAW. 

